Sofa



FIG. 1 is a front elevational view of a sofa according to an embodiment of the invention.

FIG. 2 is a rear elevational view of a sofa according to an embodiment of the invention.

FIG. 3 is a side elevational view of a sofa according to an embodiment of the invention; and,

FIG. 5 is a perspective view of a sofa according to an embodiment of the invention. 

We claim the ornamental design for sofa, as shown. 